Nonaggregational Shape-Persistent Cyclo[6]aramide and Its Macrocyclic Effect toward Binding Secondary Ammonium Salts in Moderately Polar Media

2013 ◽  
Vol 15 (18) ◽  
pp. 4670-4673 ◽  
Author(s):  
Jinchuan Hu ◽  
Long Chen ◽  
Yi Ren ◽  
Pengchi Deng ◽  
Xiaowei Li ◽  
...  
Keyword(s):  
Ammonium Salts ◽  
Polar Media ◽  
Macrocyclic Effect

Proteins as specific polar media for charge transfer processes

2012 ◽  
Vol 182 (12) ◽  
pp. 1275-1300
Author(s):  
Lev I. Krishtalik
Keyword(s):  
Charge Transfer ◽  
Transfer Processes ◽  
Polar Media

Access to Fe(II) Bis(σ-B-H) Aminoborane Complexes via Protonation of a Borohydride Complex and Dehydrogenation of Amine-Boranes

2019 ◽  
Author(s):  
Nikolaus Gorgas ◽  
Berthold Stöger ◽  
Luis F. Veiros ◽  
Karl Kirchner
Keyword(s):  
Structural Characterization ◽  
Ammonium Salts ◽  
Iron Based ◽  
Amine Boranes

We report on the first synthesis and structural characterization of the iron based aminoborane complexes. These species are formed upon protonation of a borohydride complex by ammonium salts.<br>

Influence of solvent polarity on the dual fluorescence of p-N,N-dimethylaminobenzonitrile: An AM1 theoretical study

1990 ◽  
Vol 55 (8) ◽  
pp. 1891-1895 ◽  
Author(s):  
Peter Ertl
Keyword(s):  
Excited State ◽  
Theoretical Study ◽  
Solvent Polarity ◽  
Semiempirical Method ◽  
Dual Fluorescence ◽  
Long Wavelength ◽  
Polar Media ◽  
Wavelength Emission ◽  
Ground State Geometry ◽  
Influence Of Solvent

Twisting of the NMe2 group in p-N,N-dimethylaminobenzonitrile (DMABN) was investigated using AM1 semiempirical method with configuration interaction. Effect of polar media was considered by placing + and - charge centers ("sparkles") at appropriate places opposite the molecule. Optimized ground state geometry of DMABN is slightly twisted with the lowest vertical excited state of 1B character. As the polarity of media increases and/or the - NMe2 group twists, the symmetric 1A excited state having considerable charge separation becomes energetically favorable. Anomalous long-wavelength emission of DMABN comes from this state.

(Thio)Urea-Functionalized Cavitands as Excellent Receptors for Organic Anions in Polar Media

2004 ◽  
Vol 69 (5) ◽  
pp. 1137-1148 ◽  
Author(s):  
Gennady V. Oshovsky ◽  
Willem Verboom ◽  
David N. Reinhoudt
Keyword(s):  
Binding Sites ◽  
Binding Constants ◽  
Organic Anions ◽  
Isothermal Microcalorimetry ◽  
Polar Media

Ureidocavitand 1 and thioureidocavitand 2 bind in CH3CN organic anions such as acetate, propionate, butyrate, etc. with K values of 2-8 × 105 l mol-1 and 2-9 × 106 l mol-1, respectively, as was determined with isothermal microcalorimetry (ITC). Bringing together four (thio)urea binding sites on a molecular platform gives rise to about 2000 times higher binding constants, compared with those of the corresponding single binding sites. Glucose- and galactose-containing thioureidocavitands 5 and 6 bind acetate in 1:1 CH3CN/water with a K-value of 2.15 × 103 l mol-1.

1010. Stereoisomeric pairs of cyclic quaternary ammonium salts. Part V. Derivatives of 4-aza-5α-cholestane

1965 ◽  
Vol 0 (0) ◽  
pp. 5439-5446 ◽  
Author(s):  
James McKenna ◽  
Jean M. McKenna ◽  
A. Tulley
Keyword(s):  
Quaternary Ammonium ◽  
Quaternary Ammonium Salts ◽  
Ammonium Salts ◽  
Derivatives Of

scholarly journals Resonanz-Raman-Effekt von Thiocyanatkomplexen einiger Übergangsmetalle

1970 ◽  
Vol 25 (10) ◽  
pp. 1394-1400 ◽  
Author(s):  
W. Krasser ◽  
H. W. Nürnberg
Keyword(s):  
Raman Spectrum ◽  
Infrared Spectra ◽  
High Intensity ◽  
High Frequency ◽  
Resonance Raman ◽  
Ammonium Salts ◽  
Iron Cobalt ◽  
Decay Products ◽  
Thiocyanate Complexes ◽  
Resonance Raman Spectra

Abstract The thiocyanates of the transition metals iron, cobalt, copper as well as of rhenium and of tech-netium appear in solution as strongly coloured complexes. The resonance raman bands in the sol-vent acetonitrile are investigated. To achieve an unambiguous identification the infrared spectra were recorded too. The change in position and structure of the acetonitrile bands indicates strong complexation of iron, cobalt and copper with acetonitrile, thus indicating the existence of mixed acetonitrile-thiocyanate complexes. The resonance raman spectra of the rhenium-and technetium-thiocyanates present as tetramethyl ammonium salts show however no raman-and infrared-bands of complexed acetonitrile molecules.In the raman spectrum of the thiocyanates of iron, cobalt and copper mainly the totally sym-metric C≡N, S-C, Me-S and Me-N valence vibrations are observed, among which the S-C vibration shows a remarkably high intensity. Besides, a series of bands is obtained which is inter-preted partly as caused by decay products, and partly as bands of complexed acetonitrile. The thiocyanates of rhenium and of technetium show the three possible valence vibrations only. The high frequency of the S-C valence indicates the N-coordination of the thiocyanate group.

Mechanism for Rapid Conversion of Amines to Ammonium Salts at the Air–Particle Interface

2020 ◽  
Author(s):  
Weina Zhang ◽  
Jie Zhong ◽  
Qiuju Shi ◽  
Lei Gao ◽  
Yuemeng Ji ◽  
...  
Keyword(s):  
Ammonium Salts ◽  
Rapid Conversion

scholarly journals The Oxidation of Ammonium Salts of Hydroxyfatty Acids with Hydrogen Peroxide

1908 ◽  
Vol 4 (1) ◽  
pp. 91-100
Author(s):  
H.D. Dakin
Keyword(s):  
Hydrogen Peroxide ◽  
Ammonium Salts

Effect of Ammonium Salts on Hydrolysis of Polyester Fiber

2021 ◽  
Author(s):  
A. P. Mikhailovskaya ◽  
A. A. Kaporov
Keyword(s):  
Polyester Fiber ◽  
Ammonium Salts ◽  
Hydrolysis Of
Sign in / Sign up

Export Citation Format

Share Document